9 Photovoltaic apparatus and installations for generating solar electricity, in particular photovoltaic solar panels, solar cell plates, inverters, solar modules, solar thermal and electric receivers and sensors, tracking mechanisms, concentrating optics and control algorithms; downloadable software for automatic and manual operation and control of solar tracker systems; downloadable software for locking, monitoring, securing, stabilizing and stowing solar trackers, solar tracker systems and solar panels; downloadable software for performing and predicting periodic and routine cleaning and maintenance work on photovoltaic devices and systems and solar tracking systems; solar modules in the form of solar trackers for optimizing solar energy generation; electrical control devices, namely, electrical regulators and electrical switchboards; electric integrated control systems for use in the field of solar energy generation and the optimization of solar energy yields